Electronic keyboard



FIG. 1 is a front perspective view of an electronic keyboard showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left end elevational view;

FIG. 4 is a right end elevational view;

FIG. 5 is a bottom plan view;

FIG. 6 is a front side elevational view; and,

FIG. 7 is a rear side elevational view. 

The ornamental design for an electronic keyboard, as shown. 